Cooperative Photo-/Lewis Acid Catalyzed Tandem Intramolecular [3 + 2] Cross-Cycloadditions of Cyclopropane 1,1-Diesters with α,β-Unsaturated Carbonyls for Medium-Sized Carbocycles
作者:Zhenjun Wang、Shuai Chen、Jun Ren、Zhongwen Wang
DOI:10.1021/acs.orglett.5b01928
日期:2015.9.4
A tandemisomerization/intramolecular [3 + 2] cross-cycloaddition (IMCC) of cyclopropane 1,1-diesters with α,β-unsaturated ketones/aldehydes under a cooperativecatalysis of photo and Lewis acids has been successfully developed. This supplied a general and efficient strategy for construction of medium-sized carbocyclic (8-, 9-, and 10-membered) skeletons as well as such carbocycle-based bridged oxa-bicyclo[n
已成功开发了在光和路易斯酸的协同催化下,具有α,β-不饱和酮/醛的环丙烷1,1-二酯的串联异构化/分子内[3 + 2]交叉环加成(IMCC)。这为构建中等碳环(8、9和10元)骨架以及此类基于碳环的桥接氧杂双环[ n .2.1](n = 4–6)提供了一种通用而有效的策略。骨骼。
Synthesis of Chiral Aza‐[n.2.1] Skeletons by Separable Epimers of Intramolecular [3+2] Cross Cycloaddition of Cyclopropane 1,1‐Diesters with Chiral Sulfinylimines
作者:Miao‐Miao Xia、Feng‐Xing Li、You‐Ping Ma、Le‐Le Song、Yan‐Ni Hou、Zi‐Fa Shi、Xiao‐Ping Cao
DOI:10.1002/adsc.201901543
日期:2020.3.4
Reported herein is the construction of chiral aza‐[n.2.1] skeletons by separable epimers of intramolecular [3+2] cross cycloaddition of cyclopropane 1,1‐diesters with chiral sulfinylimines. The epimer products can be separated by silica gel column chromatography.